Hydraulic press and the like



Get., 2 1923.

J. I. CREIGH HYDRAULIC PRESS AND THE LIKE Filed July 5, 1922 2f' sheets-sheet 1 l Oct. 2, 1923.

J. l. CREIGH HYDRAULIC PRESS AND THE LIKE Filed July 5, 1922 2 Sheets-Sheet 2 l [haan-far 297 MXf/MX/M MELL LAIRD a COMPANY Liifii'rin'),` AND ONE-THIRD To JAMES MCNEAL ALLAN,

BOTH or SHEE'FIELE ENGLAND.Y

HYDRAULIC PRESS AND THE Lr-KE. i"

VApplication' filed .Tuly 3, 192?.l Serial` No;l 572,637.-

To all whom t may concern:

Be it knownthat I, JOHN IANSON Ciiriiori, asubject of the King of Engla1id,:residing Vat Sheffield, in Yorkshire, England7 have in-V vented Vcertain new and useful improvements'in or Relating to Hydraulic Presses and the like, forl which I filedjan application for vpatent 'in GreatBritain on thel 13th July,'192l; and Ido hereby declare that the'following is a full, clear, and exact description ofthe same. 'i

This invention relates to hydraulic presses and the like, its objectv being to provide improvements in the controlthereof bythe provision of means `for mechanically oper-v ating the various valvesin correct sequence and automatically in the to give thedesired result.

vrequisite stages According to the present inventiona cam Shaft is provided With a series of cams each havingv an operative connection with a valve of the press 'or like hydraulicv machine and adapted to operate it in the required sequence on the rotation-of thefshaft-froin a suitable source of power..l Means'a're providedvfor applying such power to the'cam shaft and for automatically removing it at theend of aI cycle of operations.

In vthe preferred construction Va pulley or gea-r Wheel i'scofntinuously rota-ted onthe cani shaft, anda spring controlled keyHis provided movable about its own axis ina keyw'ay ofthe camshaft, the keybeing' shaped and disposedto engage'and disen gage a keyway in thehub of the pulley by inovement'about 'its own axis.V An arm is fitted or formed on the key and is accessible outsidethe camshaft and a stop inthe path of the arm is capable'of'being vmoved out of that path to enable'the key tobe fturned into an operative position by its si'iring,` andgof being returned int'othatV path'ftoY move the rey back into an inoperative'vpositionf. -Tlie key Vis 'conveniently 'mounted inbearings carried by collars which 4are secured'to the cam shaft one on each side of the lpulley or gear Wheel.'A A sectoral recess orv slot Vis foimed'inY onefcollar for thearm ofthel key and a spring enga-ging the arm and tending*` tol turn; the key into an operative position is lfitted to that -collar. iii the patlil 'ofthe Yarmfof the key is preferably 4provided by one'liinb of' a .bellcrank .other limb of the bell-'crank lever.

Figure 1 isan elevati rotate on the cam shaft l.

The stop lever or the like/Which movableLA about.`

its pivot by an.. 'operatingfpedal `or .handle which may conveniently becOnneCted tothe by l an' arrangement*offlinks and levers, whereby the bell crank lever its pivot to' removethe stop from.v the path matically: by'avveighti-or spring." Inthe:accompanyingdrawings cordiiig tol theipresent invention.

Figure-2 isV a sectional end-view'ofFigure'l'.. f f y Figure 3 isa plan of Figure'l and'Figure 4 ris a diagram'showingjthe parts-rin the l drivingposition. y I y 'Like reference Ynumerals indicate like parts throughout the drawings. 1

Amay-be turned about i' 6o of the key armaand maybe returned Vauto-zV 'f on oit-apparatus avc- 'x JOHNIANSON CREIGH, OFSHEFEIELD, ENGLANiJ, Ass'rGNoR 'or ONE-THIRD. ro CAM- Iny carrying out thef'preseiit Vinvention the various valves (not 'Show-n in' the drawings), vof the hydraulic :press or the like are arranged in line a-nda'cani sh-'aft l is mount-r ed in suitable bearings 2 parallel With and adjacent to the valves. The cain `shaft 1 isV furnished yWitha series of' cams 3 each 'ca-f pable 4of operating one valve convenientlyV throughV 'ai-Suitable lever 4; 'Ihevarioi'isv Vcams 3 are disposed atthe requisite' angle vin 1 relation to one/'another' to operate their rei spective Avalvesin the correct sequence,o ne complete vsuccessively operating all the valves. y

revolution vof the' camshaft thus' Thel cam "shaft l is' Vrotated from anyv i' l suitable sourceA of powerv and means are provided for enabling the power -tobe applied at will and tobe automatic-ally' removed at the desired vStage'i'n the press operation. Y'

vIn'th'eYY construction illustrated poiveris applied 'toa pulley-'ivhi'ch is normally freefto A key'vvay 6- (Figure is formed the-cainishaft 1 having a ltransverse section Which-is'- 'afn a'ioof a circle, preferably llessth'an'a semi-'circle` jA vkey '7V-is liitt'ed 'inthisfkeyway in Whi'chfit may partially' rotate,` tlieikey'beingemounted in bearings'carried by collars 8 and 9 which are -secured'to the cam shaftl, one onjieach sideof theY hub i0 ofthe `pulleyv5` Y(Figurev l) The key shown infFigure '2, thefpulley'eis free to if issoV shaped and disposed that itsnorma-l vorf inoperative position as loof ' tated about its own axis from the positionY shownin Figureg2 into that shownin Fig# ure Ll, one edge thereof will project out from the keyway 6 and engage a keyway 11 (of Vwhich there yare conveniently six) Yin the hubl Y of the pulley 'thereby enabling;v the pulley Yto rotate the Ycam shaft.

The key7 is provided With a suitable arm 12 and is spring-controlled as shown at13,

thc spring tending to rotate the key about its own axis into its operative position. Con-v veniently the arm 12 is dlsposed 1n arsectoral recess or slot 14 in-Vthe' collar 8, the radial l sides of lthis recess thus limiting the rotar Y the construction illustrated by one' arm 15 of a bellfcrank lever atlS and linked at`19 to a spring-controlled or lcounterweightedlever-2O capable of being parts are so arranged Y key 7 whichgwillth'en 1 aboutits OWn a-Xgis by now f be tionrofthe key-:T about its own axis.V Thel spring 13 is disposed in a suitable recess or Y angularfbore of the collar 8 communicating with Vthe sectoral recess 14,- Normally 'the i key is held inits .inoperative position by the engagement of its arm v12 with a-:movable stop. Sucha. Amovable stop is constituted 1n' 15, A16 suitably fulcrumed lifted by the operating handle or pedal (not illustrated) through 'a link 21 and Aa bell crank lever or its-'equivalent 23, ,211.'L The that whenthis handle or pedal is yoperated the limb loofy the bell crank'lever` r15, 16 is removed of and from contactiwith the arm 12 of the the spring 13 when one ofthe keywaysll in the hub of the Vpulleyfwheel arrives in the position to thus to be rotated and to enable the key 7 Y The camshaft 1 will bec-ome operative.V

rotated and valves ofthe press or the like in the sequence ,determined'by the rcla-tiveangular positions of the various cams 3. Towards the end of one revolution of the cam shaft 1, which 1n "-this*construction forms one cycle of operations, the movablestop 15, which'will have been automatically returnedto itsoriginal position shown in Figure Lupen release-0f the operating handle or pedal will come into- 1 contact Awith the arm 12, the .outer end of which willjthereby be preventedflrom conf tinuing itsmovement around Vthe axis ofthe cam shaft l.V The inner end of the arm .l2 with ,the key 7 key l7 to bet-urned about its own axis to its inoperative position and thusfthe power will-bey automatically 'cut oft" from, the camshaft. ,1V at the completion ofone revolution.

v thereof.: 'Y 60 he link 19 is conveniently .disposed in slot formed in the face of a'bracket25 jto f which the ,b'ell crank Vlever 15, 16 is ful-f crumed, and may be spring-controlled as indicated at 26 to hold'it# in Contact with the limb j16, 1f desired the bellcrank lever 15,

from the path be partiallyv rotated will operate the will, however, continue to Y v; move with the shaft 1,Y thereby causing the 167,1nay be dispensed Vwith by extending the link l9`and arranging its end inthe path of the arm V12 of the key 7. Y i, Y

To Yperform'the 'press operationv 1n two or more stages a corresponding numberof keys of like lconstruction may be provided means for applying power and.

the action of the spring when power was 1 being applied to the cam shaft Vcatch'capable of being released like vprojectionV fon Ythe power wheel. '#ith this Vconstru'ction the valves' may be operated in two or more stages by simply providing the required number off;

shifter catch.V f Y what .Claim is r; ,y y 1;;In fa hydraulic press combination-of cam shaft, a series V,of cams thereon each-havinganoperative connection by aIsuitable by a pin'or i pins orrlike prlectons on the POWGI' wheel to tripihefbelt,

orY thelike'the Y with a'y Valvefof'the press land adaptedv to l operate it in the required sequence on' the rotationof the shaft,- apulley or gear-wheel on the cam shaft, means for rotatingv it from a source of power, a spring-controlled key movable about its o-wn axis in -a keyway of the cam shaft shaped and disposed toengage and 'disengage a keyway; in the huby of the pulley by'movement aboutv its own axis,

an' arm lon the key accessible outside the cam shaft, a stop in the path of the arm, means for moving thestop out of that path, and means for returning thestop 'substantially as and for thepurposerspecified. i 2.'lna hydrauliopress or the like the combination of acam shaft, a series of 'cams thereon each having an operative connection with a yalve of thepress and adapted to operate itV in the :required sequence on the rotation of the shaft, a pulley or gear wheel on the cam shaft, means forrrotatingvit from a'surceof power, a spring-controlledkey movableabout its'own axis, 1n a keyway of arm onthe key, a colla-r secured on jthe cam shaftateach side of the pulleyv or gear wheel Ythe cam shaft shaped anddisposed to engage 1 and disengage a keyway 'in the hub ofthevr -pulley by movement .about its ownaxis, an

thereon, bearings for the key carried by` the'Y collars, aV sectoral recess 'in` one collarrfor` the key arm, aspiring engaging the` arm ,and tending to turnthe keyv intol` an operative position, a stop 'inf the pat-h of the, arm,

means for moving thestopout'of that path,

andmeans for returning the'stop, substan; tally Vas and for the purposefspecilied.'v

3. In a hydraulic pressor *the like the combination of a cam shaft, a series of cams thereon each having an operative connection with a valve of the press and adapted to operate -it in the requiredr sequence on the rotation of the shaft, a pulley or gearwheel on the cam shaft, means for rotating it from a source of power, a. spring-controlled key movable about its own axis in a keyway of the cam shaft shaped and disposed to engage and disengage a keyway in the hub of the pulley by movement about its own axis, an arm on the key accessible outside the cam shaft, a bell crank lever having one limb in the path of the arm and means opera-tively connected to the bell crank lever whereby it may be turned about its pivot to remove the limb from the said path and be returned' automatically, substantiallyvas vand for the purpose specified.'l Y Y 4. In a hydraulick press or the likeR the Y' combination of a cam shaft, a seriesl of cams thereon each having an operative connection Y with a valve of the press and adapted to 1 operate it in the required sequence on the rotation of the shaft, a pulley or gear wheel A the cam shaft shaped'and disposed to engage l and disengage a keyway in the hubY of the pulley by movement about its own axis, an

arm on the key, a collar secured on the cam shaftat each side of the pulley or gear wheel/ thereon, bearings forthe key carriedby the collars, a sectoral recess in one collarfor the key arm, a spring engaging the arm and tendingto turn the key into an operative position, a bell crank lever `having one limb in the path of the arm Yof the key Yand means operatively connected tothe bell crank lever whereby it may be turned. about its p-ivot e to remove the limb from the said path,` and be returned automatically substantially as;

and for the purpose specified.. Y

In testimony whereofV I hereunto'alix my signature. Y Y, Y Y -v p JOHN IANSONCREIGH. Vitn'esses: 1 1

ARTHUR A.VV GREENWOOD, Y VIhIAw'rHoRn VVRIGVHT.' 1 

